9.104-17
A few weeks ago I moved from UTM 8 to a new pair of appliances running UTM9. The only real difference in my configuration is that I now use the UTM9 to filter the outgoing as well as incoming. I also disabled greylisting as too many users all the time are like "hey this guy says he sent me an email 10 mins ago and i still haven't received it, why does our email suck?".
We have a single Exchange 2010 server in the host list, and I use the setting "with callout (recommended)". I'm not sure the effects of changing this to "In Active Directory".
With version 8 I would always see the SMTP log rejecting emails to mailbox users we deleted like 10 years ago. With version 9 now I see those messages to those same non-existent users being delivered. I used an external account of mine to send a test message to a non-existant mailbox at my domain and the UTM allowed the delivery to my exchange server. My external account then received a message back from my exchange server about it being undeliverable.
...so is callout suddenly broken? What are my next steps here?
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